Calibre is a powerful and easy to use e-book manager
Thorium Reader
Thorium Reader is an easy to use EPUB reading application.
Sigil
Sigil is a multi-platform EPUB ebook editor .
MComix3
MComix ge 'nar visor ar imágenes hei ar zu̲di ne personalizable. Xi diseñado específicamente pa 'ye̲ cómics (tanto cómics occidentales nu'u̲ manga) ne admite 'nar variedad formatos contenedores (incluidos CBR, CBZ, CB7, CBT, LHA ne PDF). MComix ge 'nar bifurcación Comix.
CoolReader
Cross platform open source e-book reader.
Frondoso
A simple and modern eBook viewer
Bookworm
Read the books you love without having to worry about different format complexities like epub, pdf, mobi, cbr, etc.